2006/4/18, Doug Lytle <<a href="mailto:Support@drdos.info">Support@drdos.info</a>>:<div><span class="gmail_quote"></span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
iaxmodem is a software modem that uses the IAX protocol and registers to<br>Asterisk as an IAX client allowing HylaFAX all the resources of the<br>Asterisk PRI or whatever allows connectivity.<br><br></blockquote></div>Thank you very much for the explaination.
<br><br>1. Does using iaxmodem imply that, for example, incoming fax calls are processed that way ?<br>- PSTN calls are terminated on TDM board (Digium, Sangoma, ...)<br>- the media flow (G711 as it comes from PSTN) is forwarded without any modification to the right instance of iaxmodem software process
<br>- iaxmodem process are "managed" by hylafax application but are seen and identified by Asterisk as IAX softphones (during above mentioned registration)<br>- media is processed once, according hylafax config (that often means forwarded to printer or email), after a single "move" from TDM board to server processor through PCI bus
<br><br>2. If it's correct, fax speeds and protocols (V29, G3, ...) are defined by hylafax and iaxmodem.<br>So, how do hylafax-iaxmodem speeds and protocols compare with those from a standard fax machine ?<br>I mean, if you had bought a new fax machine and had it connected to the PSTN, would you get a different set of speeds and protocols ?
<br><br>3. How do iaxmodem and rxfax-txfax DSP functions compare ? Are they using the same library ? Is there any standard allowing iaxmodem or rxfax-txfax to benefit from hardware DSP inside TDM board ?<br><br>4. How would that scale ? Up to 30 Calls ? Are incoming or outgoing faxes more demanding ? Any hardware recommended ?
<br><br>Cheers<br>Olivier<br>